Silver-gold Nanoparticles
Silver-gold Nanoparticles - Related Videos
12:39
Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method
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Cited by 28 •
2012
We synthesized star shaped gold nanostars using a silver seed mediated growth method. The diameter of the nanostars ranges from 200 to 300 nm and the number of tips vary from 7 to 10. The nanoparticles have a broad surface plasmon resonance mode centered in the near infrared.
01:26
Assessing Bacterial Respiration in Response to Silver Nanoparticles
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2025
Begin with a slurry containing bacterial cells treated with silver nanoparticles suspended in an exopolysaccharide matrix.Add a phosphate buffer to the slurry to maintain a stable pH.Next, introduce a solution containing glucose and a soluble redox indicator, then incubate the mixture. The redox indicator acts as an electron acceptor.During incubation, glucose and the redox indicator enter metabolically active bacterial cells.The cells utilize glucose during respiration, generating...
12:47
Tangential Flow Ultrafiltration: A “Green” Method for the Size Selection and Concentration of Colloidal Silver Nanoparticles
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Cited by 20 •
2012
Tangential flow ultrafiltration (TFU) is a recirculation method used for the weight-based separation of biosamples. TFU was adapted to size-select (1-20 nm diameter) and highly concentrate a large volume of polydisperse silver nanoparticles (4 L of 15.2 μg ml-1 down to 4 ml of 8,539.9 μg ml-1) with minimal aggregation.
07:08
In Situ Synthesis of Gold Nanoparticles without Aggregation in the Interlayer Space of Layered Titanate Transparent Films
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Cited by 1 •
2017
Here, we present a protocol for the in situ synthesis of gold nanoparticles (AuNPs) within the interlayer space of layered titanate films without the aggregation of AuNPs. No spectral change was observed even after 4 months. The synthesized material has expected applications in catalysis, photo-catalysis, and the development of cost-effective plasmonic devices.
13:42
Gold Nanoparticle Synthesis
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Cited by 2 •
2021
A protocol for synthesizing ~12 nm diameter gold nanoparticles (Au nanoparticles) in an organic solvent is presented. The gold nanoparticles are capped with oleylamine ligands to prevent agglomeration. The gold nanoparticles are soluble in organic solvents such as toluene.
FAQs
Internal arrangement changes how silver and gold contribute to a particle's behavior. In an alloy, the metals are combined within the same nanoscale structure, whereas a core-shell design places one metal around the other. These configurations can alter chemical reactivity, optical response, electrical behavior, and catalytic performance, giving engineers structural options for tuning a material to a target use.
Composition, particle size, morphology, and surface chemistry jointly determine how the material behaves. Composition affects the balance between silver and gold properties, while size and morphology shape optical, electrical, and catalytic responses. Surface chemistry influences interactions with surrounding environments and supports control of stability and integration. Researchers therefore adjust these variables when matching nanoparticles to a particular engineering function.
Combining silver and gold provides access to a broader design space than relying on either metal alone. The pair contributes distinct chemical, optical, electrical, and catalytic properties while allowing composition and structure to vary. This tunability helps engineers target a required balance of reactivity, light response, conductivity, or stability rather than accepting the fixed behavior of a single-metal material.
During fabrication, researchers control composition, particle size, morphology, and surface chemistry to create alloys, core-shell architectures, or other bimetallic configurations. The selected design connects processing conditions with intended stability, reactivity, light response, electrical behavior, or catalytic performance. This relationship gives engineers a basis for optimizing nanoparticles before integrating them into advanced materials or devices.
The main engineering uses identified for these particles are chemical and biological sensors, catalysts, conductive materials, and antimicrobial coatings. Each application depends on a different performance profile: sensing requires useful chemical or biological response, catalysis depends on reactivity, conductive materials rely on electrical behavior, and coatings require antimicrobial function. Composition, morphology, and surface chemistry help tailor the material for these roles.
Comparing fabrication conditions with measured nanoparticle behavior reveals which design choices produce the desired outcome. Researchers can examine whether changes in composition, size, morphology, surface chemistry, or internal structure improve stability, reactivity, light response, electrical properties, or catalytic performance. This evidence supports systematic optimization and helps guide functional integration into sensors, coatings, materials, and devices.